Z97 Gaming 7 memory issue.

MSI Z97 Gaming 7
MSI GTX 970 Gaming
Corsair Vengeance Pro 1866 CL9 16GB Dual Kit (XMP 1866mhz 1.500v 9.10.9.27)
Intell Pentium G3258 (Just sold my 4690k, and waiting for my new 4790k)
Corsair CX750M
Samsung 850EVO 500GB SSD
Corsair H100i Cooling.
Good airflow trough case, low temps on all components.
I have a issue with Dimm 2 & 4 when using XMP on my memory.
While using Dimm 2 & 4 my memory have alot of problems. Gets error in most torture test's (Intell burn in, OCCT Linpack, Prime95), random crashes, and so on. Also have got alot of errors in Memtest86+. It is quite random, sometimes it can work for several hours before it gives any error, other times it does that instant.
This does not happend while the memory is used without "overclock" 1333mhz.
But if I use Dimm 1 & 3, i have no issues. I have stable memory, no error's in Memtest86+, Prime95, Intell BurnTest and OCCT Linpack can work for hours, no random crashes in windows and so on.
The motherboard have got the latest FW, i have cleared CMOS, and tried about anything. I can also mention that the memory get slightly better "score" in a benchmark program when i tested it in Dimm1&3 rather than 2&4. Have tested several times, under same temps, and circumstances (~2890-2940 in 2&4, and ~2960-3040 in 1&3)

Have tried re-seating the CPU, but that did not make any difference. Spent a long time looking over all the pins in the socket, and everything lines up just perfect.
Found out that if i use only one ram there is no problem using XMP. But as long as i have Dual, XMP is useless. It will boot windows, but every kind of burn and ram test will get error allmost instant.
I also get errors using slot 1 & 3 as i have tested further. So by now, only thing not making problems with XMP is a single Memory stick.
Still, no problems or errors while memory is at 1333mhz and Dual. No difference if it is in 1&3 or 2&4.

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    Quote from: brettrodie on 22-March-15, 04:26:05
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                PCiRoot(0x0)/PCi(0x1f,0x2)/Sata(0x0,0x0)
         blk1 :BlockDevice - Alias (null)
                PCiRoot(0x0)/PCi(0x1f,0x2)/Sata(0x0,5x0)
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    Quote from: Sea Dog on 06-August-14, 14:36:13
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    Time will ultimately tell where my issue is.
    MSI may have lost a customer...
    The best of everything to everyone here and enjoy the rest of the day,
    Chris

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    I reset the BIOS CMOS and that fixed the issue, my machine booted using the graphics card again however as soon I rebooted windows again it lost the card switching back to the onboard.
    According to the BIOS the PCI-E slot is empty. I swapped the card out for an older ATI 7870 but had the same problem. PCI-E slot is empty unless I clear the CMOS (I made no changes in the BIOS).
    At this point it sounds like some kind of software issue I have updated my BIOS to the latest version (1.5) but that hasn't fixed the issue. Whenever I shutdown or restart it will lose sight of my card unless I clear the CMOS or power down at the wall.
    SPEC:
    Intel 4790k
    Nvidia 970 GTX
    MSI Z97i Gaming AC mini-itx
    8GB 1866mhz Kingston
    Corsair 600w PSU

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